[keycloak-user] When using Keycloak as SP in SAML via filter i.e. SamlFilter, we get exception (details inside)

[Akshay Kini]

Hi Folks,

We have configured Keycloak as an SP via filter.
Keycloak Version 1.7.0

We get this exception:
ERROR
[org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/].[AppName]]
Servlet.service() for servlet NasDefault threw exception:
java.lang.RuntimeException: This method is not supported in a restored
authenticated request
    at
org.keycloak.adapters.servlet.FilterSessionStore$1.getDateHeader(FilterSessionStore.java:178)
[:1.7.0.CR1]
    at
org.apache.catalina.servlets.DefaultServlet.checkIfModifiedSince(DefaultServlet.java:1731)
[:]
    at
org.apache.catalina.servlets.DefaultServlet.checkIfHeaders(DefaultServlet.java:608)
[:]
    at
org.apache.catalina.servlets.DefaultServlet.serveResource(DefaultServlet.java:714)
[:]
    at
org.apache.catalina.servlets.DefaultServlet.doGet(DefaultServlet.java:368)
[:]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
[:1.0.0.Final]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
[:1.0.0.Final]
    at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:324)
[:]
    at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)
[:]
... (trimmed)
...
    at
org.keycloak.adapters.saml.servlet.SamlFilter.doFilter(SamlFilter.java:125)
[:1.7.0.CR1]
...(trimmed)
...
etc.

Any ideas on what this error means?

Thanks,
Regards,
Akshay
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